From 0c54cf489b9a7389ae577bbed87d134ab11a4fcd Mon Sep 17 00:00:00 2001
From: Julius Volz <julius.volz@gmail.com>
Date: Sat, 4 Aug 2018 21:30:53 +0200
Subject: [PATCH] Document "<bool>" placeholder in API (#4465)

Signed-off-by: Julius Volz <julius.volz@gmail.com>
---
 docs/querying/api.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/docs/querying/api.md b/docs/querying/api.md
index ef9455188..e9cce44c2 100644
--- a/docs/querying/api.md
+++ b/docs/querying/api.md
@@ -52,6 +52,8 @@ selectors](basics.md#time-series-selectors) like `http_requests_total` or
 `<duration>` placeholders refer to Prometheus duration strings of the form
 `[0-9]+[smhdwy]`. For example, `5m` refers to a duration of 5 minutes.
 
+`<bool>` placeholders refer to boolean values (strings `true` and `false`).
+
 ## Expression queries
 
 Query language expressions may be evaluated at a single instant or over a range